san clase 2
DESCRIPTION
SAN Clase 2TRANSCRIPT
SANSTORAGE AREA NETWORK
Manuel Fernando Cano MontesAnalista de Servicios IT 2
SAN
• This part covers the basics of storage area networks, including what you need to know if you’re going to buy a SAN, build one yourself, or have someone build it for you.
In This Chapter
• Understanding storage area networks (SANs)• Determining whether a SAN is right for you• Looking at SAN layers and protocols• Figuring out which operating systems benefit from
SANs• Discovering which applications can use or require
SANs
Defining a SAN
• SAN (Storage Area Network) is a collection of computers and storage devices, connected over a high-speed optical network and dedicated to the task of storing and protecting data.
Defining a SAN (II)
• Using a network to create a shared pool of storage devices is what makes a SAN different.
• Various storage devices.• Sharing data between different servers.• Fast connection medium for backing up,
restoring, archiving, and retrieving data. • Can be connected over long distances, making
a SAN very useful to large companies.
Layers
Defining a SAN (III)
• Internet and its protocol. TCP/IP• Differences between fiber-optic computer networks
such as the Internet and a fiber-optic SAN. Protocol and Switches
• Fibre Channel was developed to move data really fast between computers and disk drives; TCP/IP was developed to move files over long distances between computers.
How a SAN Makes Computing Different
• Mainframes• LAN• Internet• How to share information?• LANs were connected to create the Internet.
Understanding the Benefits of a SAN
• Removes the distance limits of SCSI-connected disks• Greater performance• Increased disk utilization• Higher availability to storage by use of multiple
access paths• Deferred disk procurement• Reduced data center rack/floor space• Disaster-recovery capabilities• Online recovery
Understanding the Benefits of a SAN (II)
• Better staff utilization.• Reduction of management costs as a percentage of storage
costs• Improved overall availability.• Reduction of servers.• Improved network performance and fewer network upgrades.• Increased input/output (I/O) performance and bulk data
movement• Reduced/eliminated backup windows.• Protected critical data.• Nondisruptive scalability
Understanding the Benefits of a SAN (III)
• Easier development and testing of applications• Support for server clusters.• Storage on demand.
When is a SAN useful?
• More than 16 number of servers.• Database servers• File servers• Backup servers• Voice/video servers• Mail servers• High-performance application servers
Who should not use a SAN?
• Web servers.• All desktop PCs.• Servers needing less than 10GB of storage.• Servers that don’t need fast access to data.• Servers that have to share files.
Dissecting a SAN (The Four Ps)
• The parts: All the hardware you use to create a SAN; the switches,
• cables, disk arrays, and so forth• The protocols: The languages that the parts use to talk to
each other• The players: The folks who build the parts• The platforms: The computer applications that benefit from
using SAN